1 |
Base of vegetative stems forming a stout caudex; leaves (especially toward stem apex) and calyx lobes with white cartilaginous margin and midrib keel. |
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(2) |
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Base of vegetative axis usually slender; leaves and calyx lobes without white cartilaginous margin and midrib keel. |
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(4) |
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2 (1) |
Basal and rosette leaves distinctly contracted into petioles; calyx lobes obovate to spatulate, base distinctly narrowed |
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35 Gentiana stipitata |
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Basal and rosette leaves not distinctly contracted into petioles; calyx lobes lanceolate, elliptic, or elliptic-triangular, base scarcely narrowed. |
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(3) |
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3 (2) |
Corolla white with blue stripes and greenish spots when fresh, drying pale yellow or pale blue; lobes 5-6 mm |
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36 Gentiana szechenyii |
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Corolla ruddy purple with paler base when fresh, usually without stripes or spots; lobes 7-10 mm |
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37 Gentiana georgei |
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4 (1) |
Calyx lobes dissimilar in shape to upper leaves; plicae always asymmetrical. |
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(5) |
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Calyx lobes similar in shape to upper leaves; plicae always symmetrical. |
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(10) |
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5 (4) |
Flower in clusters of more than 3; stamens equal. |
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(6) |
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Flowers 1-3; stamens unequal. |
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(8) |
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6 (5) |
Basal rosettes none or poorly developed; lowermost stem leaves scalelike, membranous |
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29 Gentiana rigescens |
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Basal rosettes usually well developed; lowermost stem leaves not scalelike but with expanded herbaceous blades. |
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(7) |
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7 (6) |
Stems 3-15(-28) cm; corolla lobes caudate |
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30 Gentiana davidii |
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Stems (10-)20-50 cm; corolla lobes not caudate |
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31 Gentiana cephalantha |
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8 (5) |
Flowers 4merous; corolla nearly cylindric |
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32 Gentiana jingdongensis |
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Flowers 5merous; corolla funnelform. |
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(9) |
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9 (8) |
Blades of rosette leaves obovate to elliptic, abruptly narrowed into a petiole; corolla blue |
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33 Gentiana melandriifolia |
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Blades of rosette leaves narrowly spatulate to oblong-oblanceolate, gradually narrowed into a petiole; corolla rose |
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34 Gentiana duclouxii |
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10 (4) |
Stem leaves in whorls of 3-8. |
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(11) |
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Stem leaves opposite. |
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(17) |
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11 (10) |
Corolla lobes without a caudate tip. |
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(12) |
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Corolla lobes with a caudate tip to 3 mm. |
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(14) |
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12 (11) |
Margin of stem leaves and calyx lobes scabrous-ciliate |
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38 Gentiana ecaudata |
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Margin of stem leaves and calyx lobes smooth. |
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(13) |
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13 (12) |
Flowering stems with largest leaves toward apex; corolla 4.5-6 cm, lobe margin entire |
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39 Gentiana ternifolia |
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Flowering stems with largest leaves near middle; corolla 2.5-4.2 cm, lobe margin erose |
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40 Gentiana yakushimensis |
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14 (11) |
Style 5-7 mm; corolla narrowly obconic |
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44 Gentiana viatrix |
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Style 3-5 mm; corolla tubular to tubular-campanulate. |
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(15) |
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15 (14) |
Corolla lobes 2-2.5 mm, caudate tip less than 1 mm; stamens inserted just below middle of corolla tube |
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41 Gentiana tetraphylla |
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Corolla lobes 4-6 mm, caudate tip 2-2.5 mm; stamens inserted at basal part of corolla tube. |
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(16) |
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16 (15) |
Upper stem leaves and calyx lobes linear-spatulate, apex acute to obtuse |
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42 Gentiana hexaphylla |
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Upper stem leaves and calyx lobes linear, apex acuminate |
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43 Gentiana arethusae |
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17 (10) |
Corolla 1.5-2 cm; calyx lobes spreading |
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46 Gentiana altigena |
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Corolla 2.5-7.5 cm; calyx lobes straight or ascending. |
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(18) |
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18 (17) |
Basal rosettes or abbreviated vegetative shoots generally present at flowering time, their leaves usually conspicuously longer than those of flowering stems. |
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(19) |
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Basal rosettes and abbreviated vegetative shoots generally poorly developed or absent at flowering time, lowest leaves sometimes smaller and/or wider but not longer nor otherwise well differentiated. |
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(21) |
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19 (18) |
Stems papillate; corolla narrowly funnelform, 4-6 cm |
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50 Gentiana veitchiorum |
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Stems not papillate; corolla campanulate, 2.5-4.7 cm. |
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(20) |
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20 (19) |
Corolla lobes 4.5-6 mm; plicae 2-3 mm; anthers 3-3.5 mm |
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51 Gentiana nyalamensis |
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Corolla lobes 2.5-3.5 mm; plicae 0.5-1 mm; anthers 1.5-2 mm |
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52 Gentiana ornata |
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21 (18) |
Upper stem leaves orbicular, ovate, or elliptic. |
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(22) |
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Upper stem leaves linear or linear-lanceolate. |
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(25) |
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22 (21) |
Basal rosette absent; corolla cylindric |
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45 Gentiana prolata |
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Basal rosette present; corolla not cylindric. |
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(23) |
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23 (22) |
Corolla dark blue, obconic, lobes usually mucronate |
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47 Gentiana obconica |
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Corolla pale blue, not obconic, lobes not mucronate. |
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(24) |
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24 (23) |
All stem leaves elliptic |
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48 Gentiana altorum |
+ |
Lower stem leaves ovate, upper ones elliptic |
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49 Gentiana caelestis |
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25 (21) |
Flowering stems 3-5 cm; corolla 3-3.8(-4.5) cm, lobes 3-4 mm; plicae 1.5-2 mm |
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55 Gentiana oreodoxa |
+ |
Flowering stems 5-15(-20) cm; corolla 5-7.5 cm, lobes 6-9 mm; plicae 2-5 mm. |
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(26) |
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26 (25) |
Flowers usually pedicellate. |
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(27) |
+ |
Flowers sessile. |
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(28) |
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27 (26) |
Calyx lobes and middle to upper leaves broadly linear, 2-3 mm wide; corolla campanulate-tubular, inflated at middle of tube; anthers 3.5-4 mm |
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53 Gentiana dolichocalyx |
+ |
Calyx lobes and middle to upper leaves linear, often 1-1.5 mm wide; corolla narrowly obconic to funnelform; anthers 2.5-3 mm |
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54 Gentiana lawrencei |
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28 (26) |
Corolla 7-7.5 cm, inner surface blue-purple |
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56 Gentiana helophila |
+ |
Corolla 5-6 cm, inner surface blue. |
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(29) |
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29 (28) |
Corolla conspicuously spotted; lower stem leaves oblong |
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57 Gentiana futtereri |
+ |
Corolla unspotted or inconspicuously spotted; lower stem leaves linear-lanceolate |
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58 Gentiana sinoornata |